High and Low speed settings for HPI 21 Big Block

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I have a OFNA Ultra LX Pro buggy with a HPI 21 big block with a Nova Racing Head on it. I started trying to adjust on the high speed and low speed needles not having any idea what I was doing. Now I have turned them so much that it is all out of whack. I was wondering if someone out there might know what the factory settings might be or what I should do to get it back on track?

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